Ventilator operator



Jan. 22, 1935. J. R. HOWARD VENTILATOR OPERATOR Filed Oct. 27', 1950 mum ATTORNEY WITNESS Patented Jan. 22, 1935 aOFFfI-CE I .1,9s9,010 I 'JVENTILATOR .orERAToR James: Robert tHoward, iTulsa Okla.

Application OctoberZl,

1930, .SeriaLNo. 491,549

Claims. (01. 98-'111) This-invention relates to.ventilatorsand more particularly to, operators for ventilators.

A primary object of the invention is to provide a ventilator in by-the mode ofconstruction and operation of the band which connects them.

Another object of the invention iSitO actuate a plurality of 1 radially hinged vanes and an: an-

lations.

This invention is designed as an improvement same as that shown therein means for operating the ventilator constituting the new invention.

In carrying out these objects, the invention is date the ventilator. This ventilator comprises a circular plate or frame 1 provided with a plurality of peripherally spaced apertures 2 for attachment of the frame to a suitable support. A central suitable closure, not shown.

A suitable wire screen 5 is attached to the under side of the ventilator to prevent the entrance of insects and the like. A plurality of vanes or shutters 6, hinged at 6 is arranged radially be- .shuttersfit radially between the two frames ends to an annular band 8 herein termed va fro- .taryring. =It will thusrbeseen that the mounted and-hinges'fi .connect them toswing vertically arms 7 of the shutters and swing the shutters vertically in a circular direction to either open or close them according to the direction in which the gear wheel is turned. The teeth of the rack are rectangular form. has the hand grip land 14 thereof shown in the form of a handle U- shaped in cross section so that when necessary an implement may be inserted to operate the shutter band when it is located out of reach of the hand of the operator.

It is to be observed that the power from the ring is applied to the shutters at pivotal points, never less than half the width of the shutter, thereby giving more leverage and requiring less power to operate than if said points were located closer to the shutter hinges 6 The attachment of the rotary ring directly to the shutters by means of loose rivets renders the shutters positive in action and enables them to operate in unison and to be stopped, either in opening or closing, at any intermediate point thereby ment to any desired opening.v

Without further description it is thought that the features and advantages of the invention will be readily apparent to those skilled in the art, and it will, of course, be understood that changes in the form, proportion and minor details of construction will be resorted to, without departing from the spirit of the invention or its scope as claimed.

I claim:

1. In a ventilator or the like a frame, a plurality of radially disposed vanes hinged for movement toward and away from the frame, an arm fixed to each vane and extending at right angles thereto, a ring encircling the vanes and having pivotal connection with the arms, a rack carried by and curved in the direction of the ring, the teeth of the rack being positioned on a curve with the curved portion facing the frame, and a pinion carried by the frame and meshing with said rack.

permitting -adjusting movements of 2. A ventilator or the like comprising a frame, a vane hinged to move toward and away from the frame, a horizontally and vertically movable vane operating band, a connection between said band and vane whereby the opening and closing of the vane is controlled by the movement of the band, a plate carried by the band and having a series of teeth positioned on a curve with the convex portion facing the frame, and a pinion carried by the frame and meshing with said teeth.

3. A ventilator or the like comprising-a frame, a vane hinged to move toward and away from the frame, a horizontally and vertically movable vane operating band, a connection between said band and vane whereby the opening and closing of the vane is' controlled by the movement of the band,

a plate carried by the band and having a series of teeth positioned on a curve with the convex portion facing the frame, and a pinion carried by the frame and meshing with said teeth, said plate being arranged so that its lower edge will abut said frame and limit the opening and closthe vane.

4. A ventilator comprising a frame, vanes and hinge means connecting them with the frame, an annular vane operating member and pivot means connecting it with the vanes, a rack mounted on said member, and a pinion in mesh with the rack and mounted on the frame, said rack being arouate longitudinally along the band and having its teeth positioned on a curve upright to the frame, said teeth being shorter in the middle of the rack than at the ends.

' JAMES ROBERT HOWARD. 

